broken globe valve

broken globe valve

This topic has 7 replies, 5 voices, and was last updated 21 May 2017 at 11:03 by Ian S C.

Viewing 8 posts - 1 through 8 (of 8 total)

Author

Posts
20 May 2017 at 09:25 #298914
Dougie Swan
Participant
@dougieswan43463
Hi

I have a small brass globe valve that was screwed to a steel spigot

The steel part has snapped off inside the valve and all my attempts to remove it have failed

Is there any chemical way of eroding the steel and leaving the brass intact ? I have used electrosis to remove rust in the past and was thinking of this method but I am unsure what it will do to the brass

Any thoughts?

Thanks

Dougie

Edited By Dougie Swan on 20/05/2017 09:25:54
Advert

20 May 2017 at 09:25 #25244
Dougie Swan
Participant
@dougieswan43463
20 May 2017 at 10:12 #298922
JasonB
Moderator
@jasonb
Alum is sometimes used to disolve broken taps in non ferrous metal so that may work.
20 May 2017 at 12:54 #298936
Dougie Swan
Participant
@dougieswan43463
Thanks Jason

How is it used?

Dougie
20 May 2017 at 13:10 #298939
Neil Wyatt
Moderator
@neilwyatt
Just make up a solution and leave it in place for a week or so. The steel will corrode away until it becomes loose.
20 May 2017 at 13:19 #298941
JasonB
Moderator
@jasonb
Suppose to work better when hot so pinch the best saucepan and use that.

If you have a google for something like "Alum tap removal" you should find some threads on its use
20 May 2017 at 17:45 #298962
John Reese
Participant
@johnreese12848
I have often used this method:

Use a hacksaw blade to make 3 or 4 cuts inside the broken stub. Cut deep enough that the root of the threads are visible, but no deeper. Use a sharp pointed punch to collapse the broken stub. Position the punch near one of the cuts. Catch the top edge of the broken stub with the punch and drive it toward the center of the opening. Usually the stub will come free when just one segment is collapsed. If badly corroded you may have to knock out all the segments.
21 May 2017 at 11:03 #299028
Ian S C
Participant
@iansc
Best to use a non metalic container, if you are going to heat it, glass is best.

Ian S C
Author

Posts

Viewing 8 posts - 1 through 8 (of 8 total)

Please log in to reply to this topic. Registering is free and easy using the links on the menu at the top of this page.

Code of Conduct

Latest Replies

Viewing 25 topics - 1 through 25 (of 25 total)

- Topic
- Voices
- Posts
- Last Post
- Carbide tip choice advice info
  Started by: JohnF in: Workshop Tools and Tooling
- 7
- 8
- 5 August 2026 at 20:04
  JasonB
- Clarke 0.50HP 2800 rpm motor behaving oddly.
  Started by: Andrew Tinsley in: General Questions
- 5
- 7
- 5 August 2026 at 19:48
  Andrew Tinsley
- 3/16 x 30
  Started by: Peter Howell 1 in: Workshop Tools and Tooling
- 2
- 3
- 5 August 2026 at 19:46
  Peter Howell 1
- Sieg X3 Mill Toothed Belt
  Started by: Keith Rogers 2 in: Help and Assistance! (Offered or Wanted)
- 3
- 7
- 5 August 2026 at 19:23
  duncan webster 1
- A new Milling Machine
  Started by: Martin Johnson 1 in: Workshop Tools and Tooling
- 8
- 13
- 5 August 2026 at 12:58
  Martin Johnson 1
- Farm Boy 1 2 … 4 5
  Started by: Dalboy in: I/C Engines
- 17
- 119
- 5 August 2026 at 12:39
  Dalboy
- Marv Klotz Calculators for Model Engineers
  Started by: David Banham 1 in: Workshop Techniques
- 7
- 13
- 5 August 2026 at 11:41
  southernchap
- Attempt to fix, or re-purpose, or just scrap?
  Started by: Bill Phinn in: Workshop Tools and Tooling
- 14
- 18
- 5 August 2026 at 10:22
  Hollowpoint
- What the hell is going on with the suppliers??? 1 2
  Started by: Hollowpoint in: General Questions
- 15
- 26
- 5 August 2026 at 09:47
  Bo’sun
- My adventures with a bench top CNC mill 1 2 3 4
  Started by: John Hinkley in: CNC machines, Home builds, Conversions, ELS, automation, software, etc tools
- 9
- 80
- 4 August 2026 at 22:23
  John Hinkley
- Roughing End Mills
  Started by: Colin Teasdale in: Beginners questions
- 8
- 17
- 4 August 2026 at 17:06
  Mark Rand
- Mystery debris?
  Started by: Bo’sun in: The Tea Room
- 14
- 24
- 4 August 2026 at 15:59
  Bo’sun
- Plug & Play controller for a milling machine
  Started by: mhudd500 in: CNC machines, Home builds, Conversions, ELS, automation, software, etc tools
- 3
- 3
- 4 August 2026 at 13:28
  John Haine
- J style indicator holders
  Started by: BOB BLACKSHAW 1 in: General Questions
- 10
- 18
- 4 August 2026 at 11:02
  Howard Lewis
- Thanks to John Haine
  Started by: Michael Gilligan in: Clocks and Scientific Instruments
- 2
- 3
- 4 August 2026 at 10:04
  John Haine
- newbie, with some initial questions about this forum
  Started by: frippy in: General Questions
- 7
- 9
- 3 August 2026 at 19:23
  southernchap
- can anyone make me a file? 3d file
  Started by: Ian Parkin in: 3D Printers and 3D Printing
- 8
- 9
- 3 August 2026 at 16:36
  Gerard O’Toole
- Bleedin’ hydraulics!
  Started by: Kiwi Bloke in: General Questions
- 9
- 16
- 3 August 2026 at 16:20
  Adrian R2
- Myford S7 oil useage
  Started by: AStroud in: Workshop Tools and Tooling
- 5
- 8
- 3 August 2026 at 09:40
  JohnF
- 4¾” 13swg copper tubing?
  Started by: martynt50 in: Materials
- 6
- 7
- 2 August 2026 at 19:47
  martynt50
- Home thoughts from abroad
  Started by: martynt50 in: Introduce Yourself – New members start here!
- 4
- 5
- 2 August 2026 at 13:20
  martynt50
- Why righthand threads? 1 2 3
  Started by: vintagengineer in: General Questions
- 30
- 55
- 2 August 2026 at 13:08
  bernard towers
- Steam pressure guages
  Started by: Peter Venn in: General Questions
- 7
- 8
- 2 August 2026 at 13:05
  Martin Johnson 1
- Lightning 1 2 3
  Started by: duncan webster 1 in: Electronics in the Workshop
- 17
- 66
- 2 August 2026 at 12:43
  Robert Atkinson 2
- Another new member in France
  Started by: jimalm in: Introduce Yourself – New members start here!
- 8
- 8
- 2 August 2026 at 10:49
  Russell Eberhardt

Viewing 25 topics - 1 through 25 (of 25 total)

View full reply list.

Latest Issue

August 2026

Buy Latest/Back Issues

Newsletter Sign-up

Latest Replies